ABSTRACT
At that time he was commissioned to set up the famous sun dial in the Warsaw Lazienki Park (the sun dial is still there today). As setting up a sun dial required individual measurements for each location, he designed a special piece of equipment “for determining compasses in any space and in every location.” The Government Commission called it “Jastrzebowski’s Compass,” and the inventor was accepted into the ranks of the Warsaw Friends of Science Society.
